Non-detachable hinged last.



0. B. KOSTERS. NON-DETAOHABLE HINGED'LAST.

APPLICATION FILED FEB. 25. 1903.

PATENTED FEB. 18, 1908.

Witnesses.

PATENT -gor'nron OLEMENTS B; KGSTE RS, OF BUFFALG, NEW: YURII.

Specification of Letters Patent.

Patented Feb. 13; 190s.

Application filed February 25. 1903, {serial a. 145.022.

To all whom it may concern:v V

Belt known that I, CLEMENTS B. KOSTERfS, a cltizen of the United States, residing at Buffalo, in the county of Erie and Stateof New York, have invented a certain new and 'useful Improved N on Detachable Hinged Last, of which the following is a specification.

This invention relates to an improved nonseparable hinged last in which the members of the. last arehinged together by means of two plates fitted in a slot -in the last members, one of the hinge plates having a recess pro vided with a curved Wall which forms therecessv The principal object of the invention is't-o provide'a simple and very strong non-sepa:- rable hinge last of this characterl This invention also relates to the means for clamping the hinge plates in the slot in the last members so that the side walls of the slots are drawn firmly against the plates.

The invention also relates to certain details of construction, all of which will be fully and clearly hereinafter described and claimed, reference being had. to the accompanying drawings, in which,-

a Figure 1 is a longitudinal section through the improved last on line a a, Fig. 3, with the last members in extended, position. Fig' 2 is a longitudinal section through the improved last on line a a, Fig. 3, with the last members in collapsed condition. Fig. Elisa transverse section on line b b, Fig; 1.

In referring to the drawings in detail, like numerals designate like parts.

1 represents the toe or forward member of the last and 2, the heel or. rear member.

Each of the last members is-providedwith'a deep longitudinal slot 6, in its bottom surface to receive the hinge plates, which is cut in the last by means of a wabble saw before the partially completed last is severed. into its rear surface 20, andits forward surface two members. v

" The circular form of the wabble saw leaves a curved top edge or wall '7, to the slots which is substantially an arc of a circle, and the top edge 8, of the plates of the hinge is similarly curved so that when fitted in the slot, the

this is that the top edge of the hinge plates contacts at each point with a different portion of the grain of the wood in the last body and thus distributes the strain upon all the different grain parts through which the slot same against splitting from t e strain of operation of the last.

To retain the plates in place in the slot, a seriesof countersunk depressions 9, are bored in one side'of the last to receive the heads of screws .10, and'aseries of openings 11, extend inwardly from the countersunk depres sions 9, through the plates in which fastening screws engage.

In order to draw the walls of the slot 6, firmly and rigidly against the plates and thereby clamp. the plates in the slots, the

screw portions 12,- of. the screws terminate at a sufficient distance from the head 10, to leave a smoothsurfaee portion 13, which fits into-that portion ofthe openings 11, adjacent,- to the countersunk depressions 9, and that portion passing through the hinge platesthe screwhead 10, and plain surface portion i3, being upon one side of the hinge plates and extending through said hinge plates and the screw portion .12; upon the opposite side, sothat rotation of the screws into place will draw the walls toward. each other by screw pressure and rigidlygrip and clamp the hinge plates in place, substantially as shown in The hinge plates are preferably stamped up in dies from sheet-metal ofiehitablethickness, and comprise a recessedplate 14, and an extension plate 15; The recessed plate .which is preferably fitted in the slot bf the top member has the curved outer edge 8, heretofore referred to and a recess or depres sion 16, the edge wall 17, of said recess being curved to thegreater portion of a circle and terminating at itsupper end in an abrupt inwardly extending radial shoulder 18,and at its lower end in an abrupt outwardly extending shoulder 19. Theradial shoulder 18,'has

21, extending substantially radially from the center of the circle of which the wall 17, forms a part and that portion of the shoulder 18, between the inner extremes of its radial surfaces 20 and 21, has its inner surface 22, curved to an arc of a circle whose center is common with the center of the circle of the wall, 17. The extension plate 15, .is preferis'cut, thereby materially strengthening the ably fitted in the slot in the heel member and r extending shoulder 25,

gas an extension 33, which fits and turns on s peri heral edge in the recess in the plate 14 T e lower edge 24, of the extension is curved to the greater portion of a circle simi lar insize'andcurvature to the curved wall 17, of the recess, and has a rear outwardly which forms 1 the longer edge of tha't, portion of. the extension adjacent to' the body portion of the plate 15, and a forward inwardly extending radial shoulder 26, which is adapted toQfit and con tact at all points with the surface 21, ofthe shoulder 18 when the last parts tended-position as showni'nFig. 1.

. The shoulder 26, extends inwardly for a" shortdis'tance and terminates-at the lower extremity. of a curved edge 27, which forms anarc of asmaller circle than-thejcircle of the curved edge 24, and having the same common centeras-the edge 24. The curved edge 24,

termina'tes-at'its upper end in an outwardly ex tending radial'shoulder 28,- whichis.adapt-- tedto fit against the rear. surface. 20, of 'the shoulder 18, when the last members are in firmly in their hinge relation] the, colla sed' condition shown inFig. 2.

Thehinge parts are so formed that when the last is'in the extended position shown in Fig.

1,all of the angular lower edges and a pbrtion of the upper'edge of the extension are in'contact throughout. with .the irregular edge wall oftherecess so thatbthe parts'are held; 'very I The chief advantage of the hinge of this invention-resides in the fact that that portion of the curv'edperipheral edge of the ex- "ten sion'withimthe recess is always in contact throughout with the curved wall-oi the recess which provides a very. long bearing 1 surface of even curvature, and forms a hinge T40 of immense strength and'practically no wear. This construction is permissible owing to the fact that the hinge partsii'n this last are not separable lengthwise .at'any point of their. adjustment as the last members are non-de-.' tachable in contra-distinction to applicants former patent in which the last; parts were capable of being separated; at one point-of their adj u'stment.

While for some purposes the separable last i's preferable and possesses distinct advantageathe majority of shoe manufacturers seem to prefer a non-separable hing'ed last as the members cannot 'be detached and lost.

Other vadvantages reside in the ,curvedto'p wall of the slot inwhich the hin'ge'plate'slit I and-which constitutes a firm unyielding are in ,exr shoulders adapted ders ofthe recess;

porting shoulder for the curved continuously throughout to the greater portion of a cirele and terminating atone end in an inwardly extending shoulder and at the other end man-outwardly extending sho'ul--' ,der and a plate fitting in the slot of another 'member and havirig an extension ivoting andflockinginthe recess with an e( ge'eonv forming throughout in curve to curve of the recess and adapted, to be in contact. through- 7 5 out with-theunder ed'geofthe recess, and

to abut against the shouL I 2. A hinged last 'having'a longitudinal slot cut in itsbottonrsurfa'ce and provided with a curved wall constituting 'a shoulder and hinge plates in the slot having acorrespondingly curved top. edge contactingwith the shoulder, substantiall as set forth; j 3, A hinged last having a bottom lo'n'gitu dinal slot, the top wall of which is curved continuously throughout to anarc of a circle and a hinge fitting in the 'slot' and having-acor} responding continuously curved top edge adapted to abut at all points against the top 99 wall of theslot and means for rigidly clamping ,saidhinge in said slot, substantially as Set forth.

A hinged last comprisirig iajplurality or 'members and having a 1011 itudinal bottom slot'cut partly in each inem er, the top'wall of said slot .being' curved continuouslythroughout'toan arc of a circlefand a hinge com risin a like 'plu'ralityof hinge plates fitted spending curved to edgefitting' throughoutagainst the to wal, of the slot, whereby the top edgeof t e hinge-at each point rests againsta' different portion of the grain of the wood the last to strengthen. the same against'spl'itting, substantially as set forth' ELEMENTS B. KOSTERS. Witnesses: l

L. ,Srme'srnmf QHAS PANKOW.

in t e slot and provided with a cone 1 0 0 

